Zutano's skinny leggings look adorable underneith dresses and swing tees. They are made of 100% cotton. Please note that Zutano is slowly starting to label their 0-6 months size as 6 months, 6-12 months as 12 months, 12-18 months as 18 months and 18-24 months as 24 months, but the sizes are the same as before, just with a new name.